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| Source | df | Mean square | F value |
| PGRs | 3 | 665.014 | 132.27** |
| Concentration | 6 | 407.940 | 81.14** |
| PGRs*concentration | 18 | 451.170 | 89.74** |
| Error | 56 | 5.027 | |
| CV (%) | 30.38 | ||
df=Degree of freedom, CV=Coefficient of variation, F value=frequency of each value, **highly significant at P<0.001, LSD=3.67.
